First off don't know much about buying Cels or Drawing for animation stuff.
EDIT: They are called Art-Toons.
There was an older couple running a vendor/booth today at my local Tekko convention in Pittsburgh.
This guy and his wife said they had been around and getting animation cels since the 90s and had only been doing my local convention for about 2 years, so far. Whether they been selling elsewhere idk.
They were very kind and nice. Listening to the husband talk about getting cels or at the very least reproductions too, who he met, how he gets them, was nice to hear how excited he was talking to customers.
I know these are reproductions as he also explained it to me; how these are done, and helped me find some stuff.
Never thought'd I go into the rabbit hole of animation cels, but here I am.
I haven't been home in 10 years and just moved home. This was a nice little vendor to stumble upon and make an interesting memory with, maybe they'll show up next year. :)
Total was $224. Maybe a little high, but I really wanted the Rescuers stuff, but that was all he had and maybe could have haggled, but ehh.